Outer surface of a hair trimmer lid



FIG. 1 is a top view of the outer surface of a hair trimmer lid showing our new design in its intended environment;

FIG. 2 is a front end view thereof;

FIG. 3 is a rear end view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a left side view thereof; and,

FIG. 6 is a perspective view of the new design in its intended environment.

The broken lines showing the hair trimmer body and electrical cord are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for the outer surface of a hair trimmer lid, as shown and described. 